There could be several reasons why the app is not working for others. It could be due to a software bug or an issue with the connectivity of the device. You can try some of these steps to fix the issue like check your connectivity, re-open the Fitness App, enable Fitness Tracking, reboot or update your device. Restart your phone, which often fixes these types of problems since it clears out the cache and other temporary files and forces apps to refresh.
I meant where is the file of the app to share with people ?? I don't understand the app that I have download maybe the manager app but I don't know how to use it and what the people will see in the app I need link for share it